Spring Cloud Sleuth provides features to uniquely trace a service call across different microservice components. Zipkin is a distributed tracing system that's used to gather data that's needed to troubleshoot latency issues in microservices. We will be implementing a combination of Spring Cloud Sleuth and Zipkin to implement distributed tracing.

The following are the steps involved:

1. Integrate Microservice A, API gateway, and Service Consumer with Spring Cloud Sleuth.
2. Set up the Zipkin distributed tracing server.
3. Integrate Microservice A, API gateway, and Service Consumer with Zipkin.